package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.apache.poi.ss.formula.constant.ErrorConstant;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    //根据用户名查询员工
    @Override
    public Employee findByUsername(String username) {
        return employeeMapper.getByUsername(username);
    }

    //添加员工
    @Override
    public void addEmployee(EmployeeDTO emp) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(emp, employee);
        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.saveEmployee(employee);
    }

    //分页查询员工
    @Override
    public PageResult getEmployeeList(EmployeePageQueryDTO queryDTO) {
        PageHelper.startPage(queryDTO.getPage(),queryDTO.getPageSize());
        Page<Employee> p= employeeMapper.queryByPage(queryDTO);
        return new PageResult(p.getTotal(),p.getResult());
    }

    //修改员工启用/禁用状态
    @Override
    public void updateStatus(Integer status, Long id) {
        Employee employee=Employee.builder()
                .id(id)
                .status(status).build();
        employeeMapper.updateStatus(employee);
    }

    //根据id查询员工信息（用于数据回显）
    @Override
    public Employee getEmployeeById(Long id) {
        return employeeMapper.getEmployeeById(id);
    }

    //修改员工信息
    @Override
    public void updateEmployee(EmployeeDTO emp) {
        Employee e = new Employee();
        BeanUtils.copyProperties(emp, e);
//        e.setUpdateTime(LocalDateTime.now());
//        e.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateStatus(e);
    }

//    //修改密码
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        Employee emp = employeeMapper.getEmployeeById(passwordEditDTO.getEmpId());
        String oldPassword = passwordEditDTO.getOldPassword();
        String newPassword = passwordEditDTO.getNewPassword();
        if(emp.getPassword().equals(DigestUtils.md5DigestAsHex(oldPassword.getBytes()))){
            emp.setPassword(DigestUtils.md5DigestAsHex(newPassword.getBytes()));
//            emp.setUpdateTime(LocalDateTime.now());
//            emp.setUpdateUser(BaseContext.getCurrentId());
            employeeMapper.updateStatus(emp);
        }
        else{
            throw new PasswordErrorException();
        }
    }

    @Override
    public void deleteEmployeeById(long id) {
        employeeMapper.deleteEmployeeById(id);
    }
}
